A photovoltaic module backsheet separation device and separation method

Abstract

This invention provides a photovoltaic module backsheet separation device and method, relating to the photovoltaic field. The photovoltaic module backsheet separation device includes a platform, a winding roller, and a lifting structure. The platform has a bearing surface for supporting the laminate to be separated from the backsheet. The winding roller is disposed on the upper side of the bearing surface and has a fixing part for fixing the end of the backsheet. Thus, as the winding roller rolls forward relative to the bearing surface, the backsheet is wound onto the winding roller, thereby achieving the purpose of separating the backsheet from the laminate. This achieves efficient and complete separation of the backsheet, facilitating subsequent recycling and reuse. The lifting structure drives the winding roller to move up and down relative to the bearing surface, so that the distance between the winding roller and the bearing surface is adapted to the thickness of the laminate. This allows the photovoltaic module backsheet separation device to be compatible with separating backsheets from laminates of various specifications of photovoltaic modules, reducing equipment costs.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and more specifically, to a photovoltaic module backsheet separation device and separation method. Background Technology

[0002] Photovoltaic modules are devices that convert sunlight into electricity using the photovoltaic effect. With the vigorous promotion of green energy, photovoltaic modules have been widely adopted. Generally, the warranty period for photovoltaic modules is 25-30 years. After they reach the end of their service life, they need to be recycled using appropriate methods to avoid soil and air pollution problems caused by landfilling and incineration.

[0003] A single-glass photovoltaic module (referred to as a photovoltaic module in this invention) typically includes the following structure: front glass, front encapsulating film, solar cells, back encapsulating film, backsheet, aluminum frame, and junction box. The front glass, front encapsulating film, solar cells, back encapsulating film, and backsheet are sequentially stacked to form a laminate, and the aluminum frame and junction box are mounted on the laminate. To achieve the recycling of photovoltaic modules, the backsheet needs to be separated. Currently, the main methods for removing the backsheet are as follows: ① The method disclosed in invention patent CN115446073A involves heating the module and then using a roller to roll up the backsheet and encapsulation material (i.e., encapsulation film) to peel them off; ② The method disclosed in invention patent CN113385521A involves removing the backsheet by friction and recycling it as granular material; ③ The method disclosed in invention patent CN111618913A involves scraping the encapsulation film in direct contact with the glass with a scraper to obtain the intact glass and the remaining material. Methods ① and ③ fail to achieve separate removal of the backsheet, requiring secondary removal processing. Method ②, which recycles the backsheet as granular material, reduces the feasibility of resource utilization of the recycled backsheet, and backsheet particles are prone to remain on the back encapsulation film, making subsequent processing more difficult. Summary of the Invention

[0004] The purpose of this invention is to provide a photovoltaic module backsheet separation device that can improve at least one of the above-mentioned problems existing in the prior art.

[0005] Another objective of this invention is to provide another method for separating the backsheet of a photovoltaic module, which can improve at least one of the aforementioned problems existing in the prior art.

[0006] Embodiments of the present invention can be implemented in the following ways:

[0007] A photovoltaic module backsheet separation device is used to separate the backsheet from the laminate of a photovoltaic module; the photovoltaic module backsheet separation device includes:

[0008] The platform has a bearing surface for supporting the laminate to be separated from the backsheet;

[0009] A winding roller, located above the bearing surface and having a fixing portion for securing an end of a backing plate, the winding roller being used to roll forward relative to the bearing surface to separate the backing plate from the laminate; and

[0010] A lifting structure is provided, wherein the winding roller is mounted on the lifting structure, and the lifting structure is used to drive the winding roller to move up and down relative to the bearing surface so that the distance between the winding roller and the bearing surface is adapted to the thickness of the laminate, and the lifting structure is used to drive the winding roller to move downward to be in close contact with the bearing surface after the back plate is separated.

[0011] Optionally, the platform has a first heating element for heating the bearing surface to soften the adhesive film bonded to the backing plate in the laminate.

[0012] Optionally, the winding roller has a second heating element for heating the winding roller so that the winding roller heats the part of the back plate to be separated during the separation of the back plate.

[0013] Optionally, the bearing surface is square, and the bearing surface has a length direction and a width direction; the dimension of the bearing surface in the length direction is D1, D1≥3m; the dimension of the bearing surface in the width direction is D2, D2≥3m.

[0014] Optionally, the axial dimension of the winding roller is D3, where 3.5m ≤ D3 ≤ 4m.

[0015] Optionally, the fixing part is a slot formed on the winding roller, and the slot forms an opening on the outer peripheral surface of the winding roller. The opening is used for inserting the end of the back plate into the slot to fix the end of the back plate.

[0016] Optionally, the photovoltaic module backsheet separation device further includes a hot knife for peeling off the end of the backsheet.

[0017] A method for separating the backsheet of a photovoltaic module, the photovoltaic module separation method comprising:

[0018] Place the laminate on the platform's support surface;

[0019] Control the winding roller to move down to fit the laminate, and fix the end of the back plate in the laminate to the fixing part of the winding roller;

[0020] The winding roller is controlled to roll forward relative to the platform to separate the back sheet from the laminate;

[0021] After the back plate is fully in place, the winding roller is controlled to move down to fit against the bearing surface and continue forward until the winding roller moves to the end of the platform.

[0022] Optionally, after the backplate has completely detached, the step of controlling the winding roller to move down to contact the bearing surface includes:

[0023] Obtain the length and thickness of the laminate in the forward direction of the winding roller; control the winding roller to move forward from the end of the laminate, and determine that the back plate is disengaged from the laminate after the winding roller has moved a distance equal to the length; control the winding roller to move downward, and the downward movement distance is equal to the thickness value; or,

[0024] Obtain the gap distance below the winding roller; during the forward rolling of the winding roller, when the gap distance is greater than a preset value, determine that the back plate is detached from the laminate, and control the winding roller to move downward until the gap distance reaches the preset value.

[0025] Optionally, the winding roller is provided with a slot; the step of fixing the end of the back plate in the laminate to the winding roller includes:

[0026] Insert the end of the back plate into the slot;

[0027] If the length of the end of the back plate inserted into the slot is less than 20cm, the winding roller is controlled to rotate at a preset angle, and the back plate is glued and fixed to the outer surface of the winding roller with high-temperature resistant tape.

[0028] The beneficial effects of the photovoltaic module backsheet separation device and separation method provided in the embodiments of the present invention include:

[0029] This invention provides a photovoltaic module backsheet separation device that can separate the backsheet from the laminate of a photovoltaic module. The device includes a platform, a winding roller, and a lifting structure. The platform has a bearing surface for supporting the laminate to be separated. The winding roller is positioned above the bearing surface and has a fixing part for securing the end of the backsheet. As the winding roller rolls forward relative to the bearing surface, the backsheet is wound onto it, thus separating it from the laminate. This achieves efficient and complete separation of the backsheet, facilitating subsequent recycling. The lifting structure moves the winding roller up and down relative to the bearing surface, adapting the distance between the winding roller and the bearing surface to the thickness of the laminate. This allows the photovoltaic module backsheet separation device to be compatible with separating backsheets from laminates of various photovoltaic module specifications, reducing equipment costs.

[0030] Embodiments of the present invention also provide a method for separating the backsheet of a photovoltaic module. This method includes placing a laminate on a support surface of a platform; controlling a winding roller to move downwards to adhere to the laminate, and fixing the end of the backsheet in the laminate to a fixed portion of the winding roller; controlling the winding roller to roll forward relative to the platform to separate the backsheet from the laminate; after the backsheet detaches from the laminate, controlling the winding roller to move downwards to adhere to the support surface, and continuing forward until it reaches the end of the platform. This method helps to meet the need for complete individual separation of the backsheet, while also achieving compatibility for backsheet separation in laminates of various photovoltaic module specifications. Attached Figure Description

[0031] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related properties or features may have the same or similar reference numerals.

[0032] Figure 1 A schematic diagram of the backsheet separation device for photovoltaic modules according to one aspect of the present invention is shown during the backsheet separation process.

[0033] Figure 2 A side view of a photovoltaic module backsheet separation device according to one aspect of the present invention is shown.

[0034] Figure 3 A top view of a photovoltaic module backsheet separation device according to one aspect of the present invention is shown.

[0035] Figure 4A schematic diagram of a structure provided according to one aspect of the present invention is shown when a backing plate is adhered and fixed to the outer surface of a winding roller by means of a high-temperature resistant adhesive tape.

[0036] Figure 5 A flowchart of a backsheet reuse process according to one aspect of the present invention is shown.

[0037] Figure label:

[0038] 100-Photovoltaic module backsheet separation device; 110-Platform; 111-Bearing surface; 120-Wrapping roller; 121-Slot; 122-Opening; 130-Lifting structure; 140-Hot knife; 150-High temperature tape; 200-Laminated component; 211-Front glass; 212-Front sealing film; 213-Battery; 214-Back sealing film; 215-Backsheet. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0040] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "vertical" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use, and does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0041] At the same time, it should be noted that the terms "first" and "second" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0042] In the description of this invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Figure 1 This diagram illustrates the structure of the photovoltaic module backsheet separation device 100 during the backsheet 215 separation process. Figure 2 This diagram shows a side view of the photovoltaic module backsheet separation device 100 provided in this embodiment. Figure 3This diagram shows a top view of the photovoltaic module backsheet separation device 100 provided in this example. It should be noted that... Figure 1 The photovoltaic module backsheet separation device 100 shown is viewed from the front. Please refer to the reference. Figures 1-3 This embodiment provides a photovoltaic module backsheet separation device 100, which can efficiently separate the backsheet 215 in the laminate 200 completely and independently, facilitating subsequent recycling and reuse.

[0044] The photovoltaic module backsheet separation device 100 includes a platform 110, a winding roller 120, and a lifting structure 130. The platform 110 has a bearing surface 111 for bearing the laminate 200 to be separated from the backsheet 215. The winding roller 120 is disposed on the upper side of the bearing surface 111 and has a fixing part for fixing the end of the backsheet 215. Thus, when the winding roller 120 rolls forward relative to the bearing surface 111, the backsheet 215 can be wound onto the winding roller 120, thereby achieving the purpose of separating the backsheet 215 from the laminate 200. This achieves efficient and complete separation of the backsheet 215, facilitating subsequent recycling and reuse. The lifting structure 130 is used to drive the winding roller 120 to move up and down relative to the bearing surface 111, so that the distance between the winding roller 120 and the bearing surface 111 is adapted to the thickness of the laminate 200, thereby enabling the photovoltaic module backsheet separation device 100 to achieve compatibility in separating the backsheet 215 in the laminate 200 of various specifications of photovoltaic modules, reducing equipment costs.

[0045] The specific structure of the photovoltaic module backsheet separation device 100 provided in this embodiment is further described below:

[0046] Please continue to refer to the reference. Figures 1-3 In this embodiment, the platform 110 is square, and its upper end face forms the bearing surface 111. When it is necessary to separate the back plate 215 on the laminate 200, the laminate 200 is placed on the bearing surface 111. Specifically, the laminate 200 includes a front glass 211, a front encapsulating film 212, a battery 213 sheet, a back encapsulating film 214, and a back plate 215 stacked in sequence. When placing it, the back plate 215 is placed with one side facing upwards, that is, after the laminate 200 is placed on the platform 110, the front glass 211 is closer to the bearing surface 111 than the back plate 215.

[0047] Furthermore, the platform 110 has a first heating element (not shown in the figure), which is used to heat the bearing surface 111 to soften the adhesive film (i.e., the back sealing film 214) of the backplate 215 bonded in the laminate 200. Specifically, in this embodiment, the platform 110 has a heating function, thereby placing the bearing surface 111 at a relatively high temperature. When the laminate 200 is placed on the bearing surface 111, the bearing surface 111 can heat the laminate 200, thereby softening the adhesive film in the laminate 200 and facilitating the separation of the backplate 215. Optionally, the temperature of the bearing surface 111 can be set to 150°C.

[0048] It should be noted that the type of the first heating element and its placement on the platform 110 are not limited here, as long as it can heat the platform 110. For example, the first heating element can be a thermocouple or other heating element, and it can be placed inside the platform 110 to heat the platform 110. At the same time, in order to ensure that the temperature is uniform throughout the bearing surface 111, multiple thermocouple arrays can be distributed below the bearing surface 111. In some other embodiments, the laminate 200 can also be heated before it is fed onto the bearing surface 111.

[0049] In this embodiment, the winding roller 120 is a long, columnar structure mounted on the upper side of the platform 110. When the backing plate 215 is separated, the laminate 200 is located between the winding roller 120 and the support. Simultaneously, the axial direction of the winding roller 120 extends along the width direction of the platform 110. Thus, as the winding roller 120 rolls forward, it travels along the length direction of the platform 110, thereby separating the backing plate 215 located at different positions along the length direction of the platform 110.

[0050] Furthermore, the winding roller 120 has a second heating element (not shown), which is used to heat the winding roller 120 so that the winding roller 120 heats the position of the back plate 215 to be separated during the separation process of the back plate 215. Specifically, as Figure 1 As shown, during the separation of the backing plate 215, the winding roller 120 is located above the backing plate 215 and peels off the backing plate 215 by rolling in a clockwise direction, and moves towards... Figure 1 The right side of the laminate 200 shown moves so that during the separation process, the lower part of the winding roller 120 is always in contact with the part of the back plate 215 to be separated. Thus, the part to be separated can be locally heated by the winding roller 120, which further ensures that the adhesive film is in a softened state before separating from the back plate 215, ensuring that the separation is smooth and efficient.

[0051] It should be noted that the type of the second heating element and its placement on the winding roller 120 are not limited here. As long as it can heat the winding roller 120, it is sufficient. For example, the second heating element can be a heating element such as a thermocouple and placed inside the winding roller 120, for example, placed at the axis of the winding roller 120, or multiple elements can be arranged around the circumference of the winding roller 120 to achieve heating of various parts of the circumference of the winding roller 120.

[0052] In this embodiment, the winding roller 120 is provided with a fixing portion at the end of the fixing back plate 215. Optionally, as shown... Figure 1 As shown, the fixing part is a slot 121 formed on the winding roller 120, and the slot 121 forms an opening 122 on the outer peripheral surface of the winding roller 120. The opening 122 is used for the end of the back plate 215 to be inserted into the slot 121 to fix the end of the back plate 215. Specifically, the slot 121 is a groove structure extending chordally along the winding roller 120, and when the opening 122 faces downward, the slot 121 is located in the rear half of the winding roller 120 (i.e., as shown in the image). Figure 1 (The portion facing left). It is understood that the structure of the fixing part is not limited to this, and in some other embodiments, the fixing part can be specifically configured as needed.

[0053] Furthermore, the photovoltaic module backsheet separation device 100 also includes a hot knife 140, which can peel off the end of the backsheet 215. After the end of the backsheet 215 is peeled off, the peeled end can be fixed to the fixing part on the winding roller 120.

[0054] In this embodiment, the bearing surface 111 is a square with the same dimensions as the platform 110, having a length direction A and a width direction B. The dimension of the bearing surface 111 in the length direction is D1, where D1 ≥ 3m; the dimension of the bearing surface 111 in the width direction is D2, where D2 ≥ 3m. By setting the dimensions of the bearing surface 111, the platform 110 can be compatible with the current mainstream photovoltaic module product sizes, that is, it can meet the bearing requirements for modules with a length of 3m and a width of 1.5m or less. Moreover, when bearing the laminate 200, the laminate 200 can be fed in either the long side direction or the short side direction. That is, when placing the laminate 200 on the bearing surface 111, the length direction of the laminate 200 can be set to extend along the length direction of the bearing surface 111, or the width direction of the laminate 200 can be set to extend along the length direction of the bearing surface 111, making the separation operation more convenient.

[0055] It should be noted that in the description of this embodiment, "length" and "width" are only used to distinguish dimensions in different directions, and do not represent that the two have a substantial difference in size.

[0056] Furthermore, the axial dimension of the winding roller 120 is D3, where 3.5m ≤ D3 ≤ 4m. The slot 121 is an elongated groove extending along the axial direction of the winding roller 120. Thus, the length of the slot 121 can be set to be greater than 3m, thereby ensuring that the end of the back plate 215 located at one end along the length of the bearing surface 111 is fixed in the slot 121, guaranteeing reliable separation. Optionally, the axial dimension of the winding roller 120 can be set to 3.5m, 3.8m, or 4m.

[0057] This embodiment also provides a method for separating the backsheet of a photovoltaic module, which can be implemented using the aforementioned photovoltaic module backsheet separation device 100. Specifically, the photovoltaic module backsheet separation method includes:

[0058] S01: Place the laminate 200 on the bearing surface 111 of the platform 110.

[0059] The laminate 200 is placed on the bearing surface 111 of the platform 110 with the back plate 215 facing the direction, so that the laminate 200 is supported by the bearing surface 111.

[0060] Meanwhile, since the platform 110 provided in this embodiment has a heating function, after the laminate 200 is placed on the bearing surface 111, the adhesive film in the laminate 200 softens due to the heating effect of the bearing surface 111, thereby greatly reducing the adhesion between the adhesive film and the back plate 215, which facilitates the subsequent separation operation.

[0061] S02: Control the winding roller 120 to move down to fit against the laminate 200, and fix the end of the back plate 215 in the laminate 200 to the fixed part of the winding roller 120.

[0062] Furthermore, before fixing the end of the backsheet 215 in the laminate 200 to the fixing part of the winding roller 120, the photovoltaic module backsheet separation method further includes a step of separating the end of the backsheet 215. Specifically, the step of separating the end of the backsheet 215 includes: horizontally cutting the backsheet 215 and the backsheet 215 with a hot knife 140 along the forward direction of the winding roller 120, with the cut of the hot knife 140 closely following the inner side of the backsheet 215 near the backsheet 214, thereby cutting and separating the end of the backsheet 215 from the backsheet 214.

[0063] In this embodiment, the fixing part of the winding roller 120 is a slot 121 formed on the winding roller 120. Therefore, the step of fixing the end of the back plate 215 in the laminate 200 to the winding roller 120 includes: inserting the end of the back plate 215 into the slot 121.

[0064] Furthermore, if the length of the end of the back plate 215 inserted into the slot 121 is greater than or equal to 20cm, the connection between the end of the back plate 215 and the slot 121 can ensure the reliability of the connection between the back plate 215 and the winding roller 120, and the subsequent separation operation can be performed directly. If the length of the end of the back plate 215 inserted into the slot 121 is less than 20cm, for example, the length of the end of the back plate 215 separated by the hot knife 140 is 10cm, then after the end of the back plate 215 is inserted into the slot 121, the winding roller 120 needs to be rotated by a preset angle (e.g., 15°). At this time, the part of the back plate 215 located in the slot 121 is wrapped around the outside of the winding shaft. At this time, the back plate 215 can be glued and fixed to the outer surface of the winding roller 120 with high-temperature resistant tape (e.g., Figure 4 (As shown).

[0065] S03: Control the winding roller 120 to roll forward relative to the platform 110 to separate the back plate 215 from the laminate 200.

[0066] S04: After the back plate 215 is fully in place, control the winding roller 120 to move down to fit against the bearing surface 111 and continue to move forward until the winding roller 120 moves to the end of the platform 110.

[0067] When performing the above steps, it is also necessary to determine whether the back plate 215 has completely detached from the laminate 200. Specifically, this can be done in the following way:

[0068] The length and thickness of the laminate 200 in the forward direction of the winding roller 120 are obtained. Specifically, the length of the laminate 200 in the forward direction of the winding roller 120 is the dimension of the laminate 200 in the length direction of the platform 110. The thickness of the laminate 200 is the dimension of the laminate 200 in the direction from the front glass 211 to the back plate 215.

[0069] The winding roller 120 is controlled to move forward from the end of the laminate 200, and the back plate 215 is determined to be detached from the laminate 200 after the winding roller 120 has traveled a distance equal to the length of the laminate 200. The starting point of the forward movement of the winding roller 120 is set to the end position of the laminate 200, or in other words, the end of the laminate 200 is placed at the starting point of the forward movement of the winding roller 120. Thus, when the forward movement of the winding roller 120 reaches the length of the laminate 200, it indicates that the back plate 215 has been completely separated from the back sealing film 214.

[0070] At this point, the winding roller 120 can be controlled to move downwards by a distance equal to the thickness value, ensuring that the winding roller 120 remains approximately flush with the bearing surface 111 during its subsequent forward movement, preventing the back plate 215 from detaching from the winding roller 120. Once the winding roller 120 has moved to the end of the platform 110, the back plate 215 can be removed from the winding roller 120 for subsequent reuse.

[0071] It should be noted that the execution process of steps S03 and S04 is not limited here. It is understood that other methods may be used in other embodiments. For example, it can also be done in the following ways:

[0072] The gap distance below the winding roller 120 is obtained. Specifically, a distance sensor can be installed at the winding roller 120 to measure the gap distance below the winding roller 120. This distance sensor is electrically connected to the lifting structure 130, so that lifting operations can be performed based on the gap distance value detected by the distance sensor.

[0073] During the forward rolling of the winding roller 120, when the gap distance exceeds a preset value, it is determined that the back plate 215 has detached from the laminate 200. Specifically, during the forward rolling of the winding roller 120 to separate the back plate 215, the gap distance below the winding roller 120 is the distance between the bottom of the winding roller 120 and the unseparated back plate 215, and at this time the gap distance is relatively small. When the winding roller 120 moves to the end of the laminate 200, the gap distance below the winding roller 120 is the distance between the bottom of the winding roller and the bearing surface 111. Before the winding roller 120 moves downward, this distance suddenly increases, and the increase is equal to the thickness of the laminate 200. At this point, it can be determined that the back plate 215 has completely detached from the laminate 200. Subsequently, the winding roller 120 can be controlled to move downward until the gap distance reaches the preset value, that is, the winding roller 120 is approximately in contact with the bearing surface 111.

[0074] The photovoltaic module backsheet separation device 100 and separation method provided in the embodiments of the present invention efficiently achieve the individual and complete separation of the backsheet 215. After separation, there is no adhesive film residue on the backsheet 215, which facilitates subsequent recycling of the backsheet 215. Moreover, it is highly efficient and simple to operate. At the same time, it is compatible with the separation operation of the backsheet 215 in existing photovoltaic modules of various specifications and sizes, which can effectively improve the efficiency of photovoltaic module recycling and reduce recycling costs.

[0075] After the backsheet is separated, it can be reused. Specifically, Figure 5 A flowchart of the backsheet reuse process provided in this embodiment is shown, such as... Figure 5 As shown, the reuse process of this back panel includes:

[0076] S11: Mechanically cut the stripped complete backplate into backplate fragments with a side length of approximately 50–200 mm.

[0077] S12: Immerse the backplate fragments in an organic solution at a temperature range of 60℃ to 150℃ for a reaction time of 20 min to 120 min.

[0078] Specifically, the organic solution used is a lipid reagent. Optionally, the lipid reagent may be one or more of dimethyl carbonate, diethyl carbonate, dibutyl carbonate, (2-butoxyethyl) carbonate, dimethyl succinate, diethyl succinate, dibutyl succinate, dibutyl succinate, dimethyl adipate, diethyl adipate, and dibutyl adipate.

[0079] S13: After soaking, the backplate fragments are separated into a fluorine-containing layer and a fluorine-free layer, thereby obtaining the organic solution, the fluorine-containing layer of the backplate, and the fluorine-free layer of the backplate, respectively.

[0080] S14: Reuse fluorinated and non-fluorinated materials by plastic granulation and other processes.

[0081] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A photovoltaic module backsheet separation apparatus, characterized by, The photovoltaic module backboard separating device is used for separating the backboard on the laminate of a photovoltaic module; the photovoltaic module backboard separating device comprises: a platform, the platform having a bearing surface for bearing the laminate to be separated from the backboard; a winding roller, the winding roller being located on the upper side of the bearing surface, and the winding roller having a fixing portion for fixing the end portion of the backboard, the winding roller being used for rolling forward relative to the bearing surface to separate the backboard from the laminate; and a lifting structure, the winding roller being installed on the lifting structure, and the lifting structure being used for driving the winding roller to move up and down relative to the bearing surface to adapt the distance between the winding roller and the bearing surface to the thickness of the laminate, and the lifting structure being used for driving the winding roller to move downward to closely adhere to the bearing surface after the backboard is separated; the platform having a first heating member, the first heating member being used for heating the bearing surface to soften the adhesive film in the laminate to which the backboard is pasted; the winding roller having a second heating member, the second heating member being used for heating the winding roller to heat the position to be separated of the backboard in the process of separating the backboard; the fixing portion being a slot formed on the winding roller, and the slot forming an opening on the outer circumferential surface of the winding roller, the opening being used for inserting the end portion of the backboard into the slot to fix the end portion of the backboard; the photovoltaic module backboard separating device further comprising a hot knife, the hot knife being used for peeling off the end portion of the backboard.

2. The photovoltaic module backboard separating device according to claim 1, wherein the bearing surface is square-shaped, and the bearing surface has a length direction and a width direction; the size of the bearing surface in the length direction is D1, and D1≥3m; the size of the bearing surface in the width direction is D2, and D2≥3m.

3. The photovoltaic module backboard separating device according to claim 1, wherein the axial size of the winding roller is D3, and 3.5m≤D3≤4m.

4. A photovoltaic module backsheet separation method, characterized by, The photovoltaic module separating method is realized based on the photovoltaic module backboard separating device according to any one of claims 1-3, and the photovoltaic module separating method comprises: placing the laminate on the bearing surface of the platform; controlling the winding roller to move downward to closely adhere to the laminate, and fixing the end portion of the backboard in the laminate on the fixing portion of the winding roller; controlling the winding roller to roll forward relative to the platform to separate the backboard from the laminate; after the backboard is completely separated, controlling the winding roller to move downward to closely adhere to the bearing surface, and continuing to roll forward until the winding roller moves to the end of the platform.

5. The photovoltaic module backboard separating method according to claim 4, wherein after the backboard is completely separated, the step of controlling the winding roller to move downward to closely adhere to the bearing surface comprises: acquiring a length of the laminated material in a forward direction of the winding roller and a thickness of the laminated material; controlling the winding roller to move forward from an end of the laminated material, and determining that the backboard is separated from the laminated material when a distance moved by the winding roller reaches the length; controlling the winding roller to move downward, and a moving distance of the winding roller is the thickness; or acquiring a distance of a gap below the winding roller; determining that the backboard is separated from the laminated material when the distance of the gap is greater than a preset value during a rolling forward process of the winding roller, and controlling the winding roller to move downward until the distance of the gap reaches the preset value.

6. The photovoltaic module backboard separation method according to claim 4, wherein, a slot is arranged on the winding roller; and the step of fixing the end of the backboard in the laminated material on the winding roller comprises: inserting the end of the backboard into the slot; if a length of the end of the backboard inserted into the slot is less than 20 cm, controlling the winding roller to rotate by a preset angle, and sticking and fixing the backboard on an outer surface of the winding roller by using a high-temperature-resistant adhesive tape.

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